reset set terminal png font "/Library/Fonts/Courier New.ttf,12" size 640,640 set samples 1000 set xrange [-12:12] set yrange [-12:12] set arrow from 0,0 to 0,12 set arrow from 0,0 to 0,-12 set arrow from 0,0 to 12,0 set arrow from 0,0 to -12,0 set label 1 "x" at 12.25,0 set label 2 "y" at -0.2,12.4 unset key set xtics 1 font "/Library/Fonts/Courier New.ttf,8" set ytics 1 font "/Library/Fonts/Courier New.ttf,8" set grid set title right set output "blank-coordinate-plane.png" f(x) = 13 plot f(x)